Problem:
With the update to Types 3.0.2 when you display Checkboxes with a separator, the separator will be shown even for unchecked options of the field.
For example, if you have a Checkboxes field with 3 options, where the first and last are checked, the ShortCode

[types field='checkboxes-toolset' separator=','][/types]

, on the Front end will output

1,,1 ,

where expected would be

1,1

.

Solution:
Update to latest Toolset versions.